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ddrphy: partly working

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This commit is contained in:
Sebastien Bourdeauducq 2012-02-24 13:54:10 +01:00
parent 3179a27d14
commit a363eb4a36
2 changed files with 23 additions and 71 deletions
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12
software/bios/ddrinit.c
View file

@ -60,7 +60,8 @@ static void init_sequence(void)
CSR_DFII_BA_P0 = 0;
/* Load Mode Register */
setaddr(0x0132); /* Reset DLL, CL=3, BL=4 */
//setaddr(0x0132); /* Reset DLL, CL=3, BL=4 */
setaddr(0x0162); /* Reset DLL, CL=2.5, BL=4 */
CSR_DFII_COMMAND_P0 = DFII_COMMAND_RAS|DFII_COMMAND_CAS|DFII_COMMAND_WE|DFII_COMMAND_CS;
cdelay(200);
@ -76,7 +77,8 @@ static void init_sequence(void)
}
/* Load Mode Register */
setaddr(0x0032); /* CL=3, BL=4 */
//setaddr(0x0032); /* CL=3, BL=4 */
setaddr(0x0062); /* CL=2.5, BL=4 */
CSR_DFII_COMMAND_P0 = DFII_COMMAND_RAS|DFII_COMMAND_CAS|DFII_COMMAND_WE|DFII_COMMAND_CS;
cdelay(200);
}
@ -103,9 +105,9 @@ void ddrrd(char *startaddr)
cdelay(15);
for(i=0;i<8;i++)
printf("%08x ", MMPTR(0xe0000834+4*i));
printf("%02x", MMPTR(0xe0000834+4*i));
for(i=0;i<8;i++)
printf("%08x ", MMPTR(0xe0000884+4*i));
printf("%02x", MMPTR(0xe0000884+4*i));
printf("\n");
}
@ -127,7 +129,7 @@ void ddrwr(char *startaddr)
for(i=0;i<8;i++) {
MMPTR(0xe0000814+4*i) = i;
MMPTR(0xe0000864+4*i) = i;
MMPTR(0xe0000864+4*i) = 0xf0 + i;
}
setaddr(addr);

82
verilog/s6ddrphy/s6ddrphy.v
View file

@ -14,25 +14,8 @@
* This PHY only supports CAS Latency 3.
* Read commands must be sent on phase 0.
* Write commands must be sent on phase 1.
*
************* DETAILED TIMING ************
* Command path:
* posedge sys_clk + 1
* posedge clk2x_270 + 0.375
* negedge clk2x_270 + 0.125
* Command latency: 1.5 cycles
*
* Data write path (phase 0, word 0):
* posedge sys_clk [oserdes] + 1
* strobe [oserdes] + 1
* Data write latency: 2 cycles
*
* DQS OE path:
* posedge sys_clk + 1
* posedge clk2x_270 + 0.375
* negedge clk2x_270 [oddr] + 0.125
* DQS OE latency 1.5 cycles
*/
module s6ddrphy #(
parameter NUM_AD = 0,
parameter NUM_BA = 0,
@ -128,7 +111,7 @@ ODDR2 #(
*/
reg phase_sel;
always @(negedge clk2x_270)
always @(posedge clk2x_270)
phase_sel <= sys_clk;
reg [NUM_AD-1:0] r_dfi_address_p0;
@ -164,56 +147,23 @@ always @(posedge sys_clk) begin
r_dfi_we_n_p1 <= dfi_we_n_p1;
end
reg [NUM_AD-1:0] r2_dfi_address_p0;
reg [NUM_BA-1:0] r2_dfi_bank_p0;
reg r2_dfi_cs_n_p0;
reg r2_dfi_cke_p0;
reg r2_dfi_ras_n_p0;
reg r2_dfi_cas_n_p0;
reg r2_dfi_we_n_p0;
reg [NUM_AD-1:0] r2_dfi_address_p1;
reg [NUM_BA-1:0] r2_dfi_bank_p1;
reg r2_dfi_cs_n_p1;
reg r2_dfi_cke_p1;
reg r2_dfi_ras_n_p1;
reg r2_dfi_cas_n_p1;
reg r2_dfi_we_n_p1;
always @(posedge clk2x_270) begin
r2_dfi_address_p0 <= r_dfi_address_p0;
r2_dfi_bank_p0 <= r_dfi_bank_p0;
r2_dfi_cs_n_p0 <= r_dfi_cs_n_p0;
r2_dfi_cke_p0 <= r_dfi_cke_p0;
r2_dfi_ras_n_p0 <= r_dfi_ras_n_p0;
r2_dfi_cas_n_p0 <= r_dfi_cas_n_p0;
r2_dfi_we_n_p0 <= r_dfi_we_n_p0;
r2_dfi_address_p1 <= r_dfi_address_p1;
r2_dfi_bank_p1 <= r_dfi_bank_p1;
r2_dfi_cs_n_p1 <= r_dfi_cs_n_p1;
r2_dfi_cke_p1 <= r_dfi_cke_p1;
r2_dfi_ras_n_p1 <= r_dfi_ras_n_p1;
r2_dfi_cas_n_p1 <= r_dfi_cas_n_p1;
r2_dfi_we_n_p1 <= r_dfi_we_n_p1;
end
always @(negedge clk2x_270) begin
if(phase_sel) begin
sd_a <= r2_dfi_address_p0;
sd_ba <= r2_dfi_bank_p0;
sd_cs_n <= r2_dfi_cs_n_p0;
sd_cke <= r2_dfi_cke_p0;
sd_ras_n <= r2_dfi_ras_n_p0;
sd_cas_n <= r2_dfi_cas_n_p0;
sd_we_n <= r2_dfi_we_n_p0;
sd_a <= r_dfi_address_p1;
sd_ba <= r_dfi_bank_p1;
sd_cs_n <= r_dfi_cs_n_p1;
sd_cke <= r_dfi_cke_p1;
sd_ras_n <= r_dfi_ras_n_p1;
sd_cas_n <= r_dfi_cas_n_p1;
sd_we_n <= r_dfi_we_n_p1;
end else begin
sd_a <= r2_dfi_address_p1;
sd_ba <= r2_dfi_bank_p1;
sd_cs_n <= r2_dfi_cs_n_p1;
sd_cke <= r2_dfi_cke_p1;
sd_ras_n <= r2_dfi_ras_n_p1;
sd_cas_n <= r2_dfi_cas_n_p1;
sd_we_n <= r2_dfi_we_n_p1;
sd_a <= r_dfi_address_p0;
sd_ba <= r_dfi_bank_p0;
sd_cs_n <= r_dfi_cs_n_p0;
sd_cke <= r_dfi_cke_p0;
sd_ras_n <= r_dfi_ras_n_p0;
sd_cas_n <= r_dfi_cas_n_p0;
sd_we_n <= r_dfi_we_n_p0;
end
end